\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{circuitikz}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes}
\ctikzset{bipoles/length=1cm}
\begin{document}
\small
\begin{circuitikz}[>=latex, scale=1,european]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
  \draw (0,0)--(3,0);
  \draw (4,0)--(5.5,0);
  \draw (0,2) to [rmeter, t=G] (4,2)--(5.5,2) to [battery,name=dc] (5.5,0);
  \draw (0,0) to [american inductors, L,name=xq] (0,2);
  \draw (3.5, 2) to [C=$C$] (3.5,0.6)--(3.5,.5);
  \draw [fill=white] (3,0) circle (1.5pt);
  \draw [very thick] (3.5,.5)--(3.5,-.2)node [below]{$K$}; 
  \draw [fill=white] (3.5,.5) circle (1.5pt);
  \draw [fill=white] (4,0) circle (1.5pt);
  \node at (xq.center)[right]{$L$};
  \node at (dc.center)[right=2.5mm]{$E$};
  \draw [very thick]  ([xshift=-3mm]xq.left)--([xshift=-3mm]xq.right);
  \draw [fill=black] (3.5,2) circle (1.5pt);
\end{circuitikz}
\end{document}